No they aren’t. They have similar wealth to other Caribbean nations, being richer than places like Jamaica and Haiti but poorer than Trinidad or the Dominican Republic. In global terms they rank 83rd, so above average, and they have a relatively high development index, I.e. pretty good health care and education. They might seem poor to you, but they’re actually richer than most of world.
FC2 was totally fine for me when I played it on PC, both close to release and later, I guess it just had issues on certain hardware…